In playing with an Arduino with an ADXL335, I can calibrate the sensor and get readings as I tilt the board on the X and Y axis.
But... how do I measure acceleration instead of tilt?
Example. Lay the board flat on a desk. Push it in the X direction... I want to measure the force of the acceleration. Now stop pushing it... I want to measure the force of the deceleration.
If I hook up an serial port and try this, I see no change at all in the X, Y, or Z readings. If I pick the board up and tilt it... I see changes as I tilt about the X or Y axis. But where's the force (Luke?) of acceleration in one direction?
Please send help.... :)